Carpets in a home are not the greatest idea. They do retain a lot of dirt and can be harmful to the air quality in your home. Worst case scenario, they can be a place where mold can grow freely. This is especially common in homes that have poor air circulation and moisture problems, but if this doesn’t describe your home, you should still be careful so mold doesn’t get a foothold where you live.
Mold spores are everywhere, so they only need to find a good place to settle down to start spreading. If you spill liquid on your carpet, you should clean it up well immediately. If it is a large spill, it might be necessary to have a fan blowing on the spot for a while to help it dry.
Mold could even grow underneath your carpet, going undetected for a long period of time. This could lead to allergic reactions and poor air quality in your home.